Which description best matches thermoset polymers?

• A. Linear chains; remoulded by heating
• B. High reversibility under heat
• C. Easily melted and re-formed
• D. Inter-linked chains; moulds quickly; solvent resistance; heat resistance

Answer: (D)

Thermoset polymers are formed by curing into a rigid, crosslinked network. That inter-linked structure locks the material in place, so it does not melt or flow when heated and it resists solvents and high temperatures. They are shaped in a mold while the resin is still curing, which is why molding happens quickly during processing. This combination—crosslinked chains, moldable during curing, plus strong solvent and heat resistance—best matches the description. In contrast, linear or easily melted-and-reformed descriptions point to thermoplastics, not thermosets.